NAME

RDF::Query::Algebra::Optional - Algebra class for Optional patterns

VERSION

This document describes RDF::Query::Algebra::Optional version 2.907.

Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.

new ( $pattern, $opt_pattern ): Returns a new Optional structure.
construct_args: Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
pattern: Returns the base pattern (LHS) onto which the optional pattern joins.
optional: Returns the optional pattern (RHS).
sse: Returns the SSE string for this algebra expression.
as_sparql: Returns the SPARQL string for this algebra expression.
as_spin ( $model ): Adds statements to the given model to represent this algebra object in the SPARQL Inferencing Notation (http://www.spinrdf.org/).
as_hash: Returns the query as a nested set of plain data structures (no objects).
type: Returns the type of this algebra expression.
referenced_variables: Returns a list of the variable names used in this algebra expression.
potentially_bound: Returns a list of the variable names used in this algebra expression that will bind values during execution.
definite_variables: Returns a list of the variable names that will be bound after evaluating this algebra expression.

 Gregory Todd Williams <gwilliams@cpan.org>